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Update with new parent-ids patch.

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bzrlib/delta.py
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from bzrlib.inventory import InventoryEntry
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from bzrlib.trace import mutter
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from bzrlib.symbol_versioning import deprecated_function, zero_ten
 
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from bzrlib.symbol_versioning import deprecated_function, zero_nine
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class TreeDelta(object):
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            show_list(self.unchanged)
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@deprecated_function(zero_ten)
 
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@deprecated_function(zero_nine)
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def compare_trees(old_tree, new_tree, want_unchanged=False,
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                  specific_files=None, extra_trees=None,
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                  require_versioned=False):
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    old_inv = old_tree.inventory
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    new_inv = new_tree.inventory
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    delta = TreeDelta()
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    mutter('start compare_trees')
 
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    # mutter('start compare_trees')
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    # TODO: Rather than iterating over the whole tree and then filtering, we
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    # could diff just the specified files (if any) and their subtrees.  
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        """We have matched up 2 file_ids, check for changes."""
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        assert old_entry.kind == new_entry.kind
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        if old_entry.kind == 'root_directory':
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            return
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        if specific_file_ids:
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            if (old_entry.file_id not in specific_file_ids and 
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                new_entry.file_id not in specific_file_ids):